Microwave radiation has a wavelength on the order of 1.0 cm. Calculate the frequency and the energy of a single photon of this radiation. Calculate the energy of an Avogadro's number of photons (called as einstein) of this radiation.

Given that,

The wavelength of microwave radiation = 1 cm = 0.01 m

To find,

The frequency and the energy of a single photon of this radiation.

Solution,

Let f be the frequency of the wave. The relation between frequency and wavelength is given by :

Let E be the energy of the wave. The energy of the wave is given by :

We know that,

Energy :

Hence, this is the required solution.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

a electronegativity decreases beacuse the size of nucleus is bigger.